DE552479C - Length measuring stick with a counter that emits an audible signal when switching - Google Patents

Description

Length measuring stick with a counter that emits an audible signal when switching releases The invention relates to a measuring device for length measures. especially Ellen- or Meter sticks, which is provided with a counter that the measurements carried out automatically added when a switch button is pressed, each individual measurement by a displays an acoustic signal and indicates the total number of units measured.

To prevent the counter from returning to the zero position Knob can be rotated for fraudulent purposes during counting is in accordance with the invention the counter built in such a way that as soon as this knob is turned, the counters are empty run or be locked and (read the hammer mechanism is switched off so that one can with measuring can only continue if the counter has been set to zero beforehand is.

This advantage is achieved according to the invention in that with the shaft of the rotary knob used to return the counter to the zero position a cam is firmly coupled, preferably by lifting pawls at a Rotation of the knob cancels the connection between the counter and the switch button or this locks and thereby also the signaling device for so long out of action sets, his (read the counter back to the zero position by turning the button again is brought.

In the following, the subject matter of the invention is based on the drawing, which represents an embodiment for a meter stick is described.

Fig. I shows a plan view of the measuring device.

Fig. 2 inclines a longitudinal section to this. Fig.3 is a plan of the Counter and striking mechanism without the measuring device.

The counter is operated by a single key i ', which exactly is attached to the end of the meter stick 3 '. The number discs q. ', 5' sit on top a shaft 6 'with a longitudinal groove 7' and are equipped with pawls 8 ', 8a', the below Action of the springs g ', ga' engage in the groove in the manner described above. A gear wheel i o 'is attached to the disk 5', in which a gear i i 'engages, that by teeth 12 'of the disc d.' every time this disk 4 'makes a full turn has carried out, is incremented and thereby the disk 5 'by' / io revolution advances. The disc 5 'is by a pawl 28, which has a toothing 27 of the disc 5 'is in engagement, held in its new position. The i 'key runs vertically in a guide 13 'and moves when going down with a mandrel 13 "a disc 13" 'which sits loosely on the shaft 6' and a pawl 14 'wears. This is fastened by a spring 15 'against a on the number disc 4' Gear 16 'pressed. With each downward movement of the button i ', the pawl i4' rotates it Gear 16 'further by one tooth; but as soon as the key i 'under the action of the spring 17 'goes back up, the pawl slides over the gear 16', which of a pawl 14 is held. Each time the key i 'is pressed, therefore the number disc. #% o revolution, and the next - number appears -at window 18 '.

The acoustic control device consists of a small hammer 2o ', which sits on an axis of rotation 21 and under the action of a spring 22 against a sounding spring 23 strikes.

To bring the counter into the zero position, there is a button ig 'at the end the shaft 6 'is provided. This knob is turned in the sense in which the Pawls 8 ', 8a' engage in the groove 7 'of the shaft 6' and turn it until the window 18 'the two zeros of the disks 4' and 5 'appear. The device for prevention fraudulent measures when measuring is designed as follows.

If you start to turn the button ig 'and thus the shaft 6', it turns at the same time a cam 25 and two spring pawls 26, 26 'emerge from their notches, wherein the pawl 26 'lifts the pawl 24 from the gear 16' and the hammer 2o ' pushes away from the sounding spring 23. The number disc 4 'is therefore loose, and the counting cannot be continued, but you have to open the counter again Reset zero and repeat the measurement, because the number disc 4 'turns return to the starting position after each actuation, as it is no longer possible is prevented by the pawl 24. The count therefore does not go any further, and besides The acoustic control signal no longer sounds either because the hammer is no longer open the spring 23 strikes.

However, as soon as the two number discs .4. '. and 5 'have returned to the zero position, the two pawls 26, 26' fall back into their notches on the '-', block 25, and the device can work again.

The rear edge i. the key i 'drops when the key is depressed coincide exactly with the edge of the measuring stick so that the measurement is made by the button does not lose any of its accuracy.

The number of number discs .4. ' and 5 'can be increased so that the counter can also display more than 9g units.

Furthermore, a device for adding up the amounts of all Measurements carried out in a certain period of time, i.e. a totalizer, attached be.

The measuring device can be fixed to a counter or to other furniture be cultivated.

Claims (1)

PATENT CLAIM: Length measuring stick with a vain counter that turns on when switching emits an audible signal, characterized in that with the shaft (6) of the for Return of the counter to the zero position serving rotary knob (ig ') a cam (25) is firmly coupled, which is preferably achieved by lifting pawls (26, 24) a turn of the knob (ig ') the connection between the counter (4, 5) and the switch button (i) cancels or locks it and thereby also the signaling device remains inactive until the counter can be turned by turning the button again (ig ') is brought back to the zero position.